Kohler Exhaust Fume Intrusion

Strong exhaust smell or fumes inside the house when generator runs

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Improper exhaust routing, Exhaust leak at manifold or joints, Enclosure not sealed to pad, Generator installed too close to openings

How to Fix / Troubleshooting

Safety first: Shut down the generator immediately if exhaust fumes are detected indoors. Ventilate the building and consider using CO detectors.

  • Inspect exhaust system: Check for leaks at the exhaust manifold, flex connector, and joints. Tighten or replace gaskets and clamps as needed.
  • Check routing: Ensure exhaust outlet is directed away from windows, doors, and air intakes per Kohler installation guidelines.
  • Seal enclosure: Verify that the generator enclosure is properly sealed to the concrete pad to prevent fumes from entering conduit or building penetrations.

Exhaust system modifications should comply with local codes and Kohler recommendations; consult a qualified installer.

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Repair Difficulty

Hard 4/5

Required Part

Exhaust Flex Connector
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